zmk-steno-engine/README.md
afiqzudinhadi 1ec204b845 Scaffolding: ZMK module structure, Kconfig, DTS, behavior driver
- zephyr/module.yml with dts_root for dt-bindings
- Kconfig: STENO_ENGINE, dict selection (Plover/Lapwing/test),
  MPHF toggle, Unicode modes, history size, multi-stroke timeout
- DTS behavior binding (one_param, steno key index)
- behavior_steno.c: chord accumulation, all-up detection,
  multi-stroke buffering with timeout, star undo, formatter pipeline,
  3-way dict dispatch (split/MPHF/simple trie)
- dict_embed.S: .incbin from generated header path
- steno_keys.h: 23-key layout, bit positions matching compiler
2026-07-02 02:04:28 +08:00

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# zmk-steno-engine
Clean-room stenography engine for [ZMK Firmware](https://zmk.dev). Dictionary-based lookup with multi-stroke support, optimized for nRF52840 flash constraints.
**Status:** Early development — basic single/multi-stroke lookup works, formatter not yet implemented.
## Features
- Standard 23-key steno layout
- Sorted-array dictionary with binary search lookup
- Multi-stroke support with configurable timeout
- All-up chord detection
- HID keyboard output (ASCII)
- Build-time dictionary compilation from Plover JSON
- Test dictionary included for development
## Building
Add as a ZMK module in your `west.yml`:
```yaml
manifest:
remotes:
- name: zmk-steno-engine
url-base: https://github.com/afiqzudinhadi
projects:
- name: zmk-steno-engine
remote: zmk-steno-engine
revision: optimize-dict
```
Enable in your `.conf`:
```
CONFIG_STENO_ENGINE=y
```
Use in your keymap:
```dts
#include <dt-bindings/zmk/steno_keys.h>
/ {
keymap {
steno_layer {
bindings = <
&steno STENO_SL &steno STENO_TL &steno STENO_PL ...
>;
};
};
};
```
## Dictionary Compiler
```bash
# Compile test dictionary
python3 tools/compile_simple.py dicts/test.json -o steno_dict.bin --stats
# Compile Plover dictionary (trimmed)
python3 tools/compile_simple.py plover-main.json -o steno_dict.bin --max-entries 120000 --stats
```
## License
[PolyForm Noncommercial 1.0.0](LICENSE)